M. Strohmaier, M. Kroell, and C. Koerner. Proceedings of the Workshop on Web Search Click Data WSCD'09, in conjunction with WSDM 2009, Barcelona, Spain, ACM, (2009)
F. Suchanek, M. Vojnovic, and D. Gunawardena. CIKM '08: Proceeding of the 17th ACM conference on Information and knowledge mining, page 223--232. New York, NY, USA, ACM, (2008)